Advanced Patterns in TuskLang - Bash Guide

🧩 Revolutionary Advanced Patterns Configuration

Advanced patterns in TuskLang empower you to build robust, scalable, and maintainable Bash systems. No more copy-paste scripting or fragile glue code—everything lives in your TuskLang configuration with reusable modules, composable directives, and intelligent orchestration.

> "We don't bow to any king" – TuskLang advanced patterns break free from traditional scripting limitations and bring modern software architecture to your Bash applications.

🚀 Core Advanced Pattern Directives

Basic Advanced Pattern Setup

#pattern: enabled                    # Enable advanced patterns
#pattern-modules: true               # Enable module system
#pattern-composition: true           # Enable composition
#pattern-orchestration: true         # Enable orchestration
#pattern-inheritance: true           # Enable inheritance
#pattern-overrides: true             # Enable overrides

Advanced Pattern Configuration

#pattern-dependency-injection: true  # Enable dependency injection
#pattern-factory: true               # Enable factory pattern
#pattern-singleton: true             # Enable singleton pattern
#pattern-observer: true              # Enable observer pattern
#pattern-strategy: true              # Enable strategy pattern
#pattern-middleware: true            # Enable middleware

🔧 Bash Advanced Pattern Implementation

Module System

#!/bin/bash
Module system implementation
pattern_module_loader() {
    local module_name="$1"
    local module_dir="${pattern_module_directory:-/etc/tusk/modules}"
    local module_file="$module_dir/$module_name.sh"
    
    if [[ -f "$module_file" ]]; then
        source "$module_file"
        echo "✓ Module loaded: $module_name"
    else
        echo "✗ Module not found: $module_name"
        return 1
    fi
}

Composition and Orchestration

#!/bin/bash
Compose multiple modules
pattern_compose_modules() {
    local modules=("$@")
    for module in "${modules[@]}"; do
        pattern_module_loader "$module"
    done
    echo "✓ Modules composed: ${modules[*]}"
}
Orchestrate workflow
pattern_orchestrate_workflow() {
    local steps=("$@")
    for step in "${steps[@]}"; do
        echo "Running step: $step"
        $step
    done
    echo "✓ Workflow orchestrated"
}

Inheritance and Overrides

#!/bin/bash
Inheritance pattern
pattern_inherit() {
    local base_module="$1"
    local child_module="$2"
    pattern_module_loader "$base_module"
    pattern_module_loader "$child_module"
    echo "✓ $child_module inherits from $base_module"
}
Override function
pattern_override_function() {
    local function_name="$1"
    local new_implementation="$2"
    eval "$function_name() { $new_implementation; }"
    echo "✓ Function $function_name overridden"
}

Dependency Injection

#!/bin/bash
Dependency injection pattern
pattern_inject_dependency() {
    local target_function="$1"
    local dependency="$2"
    eval "$target_function() { $dependency; }"
    echo "✓ Dependency injected into $target_function"
}

Factory and Singleton Patterns

#!/bin/bash
Factory pattern
pattern_factory() {
    local type="$1"
    case "$type" in
        "logger")
            echo "Creating logger instance"
            ;;
        "metrics")
            echo "Creating metrics instance"
            ;;
        *)
            echo "Unknown factory type: $type"
            ;;
    esac
}
Singleton pattern
pattern_singleton() {
    local instance_var="$1"
    if [[ -z "${!instance_var}" ]]; then
        eval "$instance_var=1"
        echo "✓ Singleton instance created: $instance_var"
    else
        echo "✓ Singleton instance already exists: $instance_var"
    fi
}

Observer and Strategy Patterns

#!/bin/bash
Observer pattern
pattern_observer() {
    local event="$1"
    local callback="$2"
    eval "trap '$callback' $event"
    echo "✓ Observer set for event: $event"
}
Strategy pattern
pattern_strategy() {
    local strategy="$1"
    case "$strategy" in
        "fast")
            echo "Using fast strategy"
            ;;
        "safe")
            echo "Using safe strategy"
            ;;
        *)
            echo "Unknown strategy: $strategy"
            ;;
    esac
}

Middleware Pattern

#!/bin/bash
Middleware pattern
pattern_middleware() {
    local request="$1"
    local middlewares=("$@")
    for middleware in "${middlewares[@]:1}"; do
        $middleware "$request"
    done
    echo "✓ Middleware chain executed"
}

🎯 Real-World Configuration Examples

Complete Advanced Pattern Configuration

advanced-patterns-config.tsk
advanced_patterns_config:
  modules: true
  composition: true
  orchestration: true
  inheritance: true
  overrides: true
#pattern: enabled
#pattern-modules: true
#pattern-composition: true
#pattern-orchestration: true
#pattern-inheritance: true
#pattern-overrides: true
#pattern-dependency-injection: true
#pattern-factory: true
#pattern-singleton: true
#pattern-observer: true
#pattern-strategy: true
#pattern-middleware: true
#pattern-config:
 modules:
   - name: logger
     enabled: true
   - name: metrics
     enabled: true
 composition:
   enabled: true
   modules: ["logger", "metrics"]
 orchestration:
   enabled: true
   steps: ["init_logger", "init_metrics", "run_app"]
 inheritance:
   enabled: true
   base: "base_module"
   child: "custom_module"
 overrides:
   enabled: true
   functions:
     - name: log
       implementation: "echo 'Custom log'"
 dependency_injection:
   enabled: true
   targets:
     - function: "run_app"
       dependency: "logger"
 factory:
   enabled: true
   types: ["logger", "metrics"]
 singleton:
   enabled: true
   instances: ["logger_instance"]
 observer:
   enabled: true
   events: ["EXIT"]
   callbacks: ["cleanup"]
 strategy:
   enabled: true
   strategies: ["fast", "safe"]
 middleware:
   enabled: true
   chain: ["auth_middleware", "logging_middleware"]

Multi-Pattern Configuration

multi-pattern-config.tsk
multi_pattern_config:
  modules:
    - name: logger
      enabled: true
    - name: metrics
      enabled: true
  composition: true
  orchestration: true
  inheritance: true
  overrides: true
#pattern-logger: enabled
#pattern-metrics: enabled
#pattern-composition: true
#pattern-orchestration: true
#pattern-inheritance: true
#pattern-overrides: true
#pattern-config:
 modules:
   logger:
     enabled: true
   metrics:
     enabled: true
 composition:
   enabled: true
   modules: ["logger", "metrics"]
 orchestration:
   enabled: true
   steps: ["init_logger", "init_metrics", "run_app"]
 inheritance:
   enabled: true
   base: "base_module"
   child: "custom_module"
 overrides:
   enabled: true
   functions:
     - name: log
       implementation: "echo 'Custom log'"

🚨 Troubleshooting Advanced Patterns

Common Issues and Solutions

1. Module Loading Issues

Debug module loading
debug_module_loading() {
    local module_name="$1"
    echo "Debugging module loading: $module_name"
    pattern_module_loader "$module_name"
}

2. Composition Issues

Debug composition
debug_composition() {
    local modules=("$@")
    echo "Debugging composition: ${modules[*]}"
    pattern_compose_modules "${modules[@]}"
}

🔒 Security Best Practices

Advanced Pattern Security Checklist

Security validation
validate_advanced_pattern_security() {
    echo "Validating advanced pattern security configuration..."
    # Check module directory permissions
    local module_dir="${pattern_module_directory:-/etc/tusk/modules}"
    if [[ -d "$module_dir" ]]; then
        local perms=$(stat -c %a "$module_dir")
        if [[ "$perms" == "700" ]]; then
            echo "✓ Module directory permissions secure: $perms"
        else
            echo "⚠ Module directory permissions should be 700, got: $perms"
        fi
    else
        echo "⚠ Module directory not found"
    fi
    # Check for code injection risks
    # (Review module code for unsafe eval/source usage)
}

📈 Performance Optimization Tips

Advanced Pattern Performance Checklist

Performance validation
validate_advanced_pattern_performance() {
    echo "Validating advanced pattern performance configuration..."
    # Check module loading speed
    local start_time=$(date +%s%N)
    pattern_module_loader "logger"
    local end_time=$(date +%s%N)
    local duration=$(( (end_time - start_time) / 1000000 ))
    echo "Module loading time: ${duration}ms"
    # Check composition overhead
    # (Measure time to compose multiple modules)
}

🎯 Next Steps

- Continuous Integration: Learn about advanced pattern CI/CD - Pattern Marketplace: Explore reusable pattern libraries - Pattern Testing: Test advanced pattern integration - Pattern Refactoring: Refactor legacy scripts using patterns

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Advanced patterns transform your TuskLang configuration into a robust, maintainable system. They bring modern software architecture to your Bash applications with reusable modules, composable directives, and intelligent orchestration!